printing telegraph receiver



J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION FILED NOV. 15. lm.

Patented Oct. 5, 1920.

8 SHEETS-SHEET I.

INVENTOR W fflwc/ ATTORNEYS J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION FILED NOV. 15, 1918- 7 1,354,657. Patented 0%. 5,1920.

8 SHEETS-SHEET 2.

w A Iron/m;

J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION FILED NOV. Is. 1918.

1,354,657. I Patented Oct. 5, 1920.

8 SHEETS-SHEET 3.

W? BY W flw A non/1m J. M. JUY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION, FILED NOV. 15. 1918.

1,354,657, Patented Oct. 5, 1920.

8 SHEETS-SHEET 4-' W was INVENTOR I 5 .Br

J. M. JOY. PRINTING TELEGRAPH RECEIVER.

. APPLICATION FILED NDV.15 1918- I 1,354,657. 7 Patented Oct. 5,1920.

8 SHEETS-SHEET 5.

MA TTUH/VEVS J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION man NOV. 15, 1918.

1,354 51 I Patented Oct. 5,1920.

8 SHEETS-SHEET 6.

INVENT R h BY 4 fla ATTORNEYS J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

APPLICATION FILED NOV. 15, 1918.

Patented Oct. 5, 1920.

8 SHEETS-SHEET 7.

17/ [5 INVENTOR M ATTORNEYS J. M. JOY.

PRINTING TELEGRAPH RECEIVER.

INVENTOH g 5 I M Jfi/vn rronuzys 8 SHEETS-SHEET 8.

Patented Oct. 5,1920.

APPLICATION FILED NOV. 15. 1918.

*UNITED STATES PATENT OFFICE.

JOHN M. JOY, OF NEPPERHAN HEIGHTS, NEW YORK.

To all whom it may concern:

Be it'known that I, JOHN M. JoY, a cititain new and useful Improvements in Printing-Telegraph Receivers, of which the following is a specification. r My invention relates to printing telegraph receivers, and more particularly to the class of receivers known as page printers or telegraph typewriters.

- One of the objects of myinvention is the provision of a printing telegraph of this character in which a standard typewriting machine forms a part.

There are many advantages derived from the use of a standard typewriter as a part of the receiving apparatus. The typewriter is highly standardized and perfected mechanically, and its use in conjunction with suitable instru'rnentalities for automatically operating the same over a line circuit simplifies the entire receiving instrument as a commercial device. It is, therefore, possible to concentrate perfection of design and construction in fewer parts and devicesnamely, those which bring into operation the parts of the already perfectedtypewriter.

A further object of my invention is to obtain certainty of operation and reduction of adjustments by eliminating as many small and intricate parts as possible.

. Much of the efiiciency of this invention is due to the fact that all of these results are obtained by the use of a single source of powernamely, a constantly rotating drive shaft,'which constantly supplies power to the various mechanisms and which power is controlled by independent escapements which hold them intermittently at rest. In other words, the electromagnets are used merely for releasing, stopping and generally for controlling the action or operation of thesaid motive power.

7 Other objects of my invention will more fully appear from thespecification and will be particularly pointed out in the claims.

y invention will best be understood by reference to the accompanying drawings in which Figure 1 is a front elevation of that much of the typewriter and the other devices .which have been adapted to its operation over the telegraph line, and which embody one specific form of my invention; Fig. 2 is a View of the machine as seen from e right Specification of Letters Patent.

' PRINTING-TELEGRAPH RECEIVER.

Patented Oct. 5, 1920.

Application filed November 15, 1918. Serial No. 262,674.

hand end; Fig. 3 is a plan view of the lefthand portion shown in Fig. 2; Fig. ,4 is an end elevation of Fig. 1 as viewed from the left; Fig. 5 is a sectional view, taken along the dotted line 55 in Fig. 1, and looking toward the right; Fig. 6 is an enlarged view of the detail of one of Fig. 7 contact closing device used in connection with repeating line spaces; Fig. 8 is an enlarged perspective view of the adjustable hammer mechanism which operates the type bars; Fig. 9 is a perspective view showing the magnet and escapment which controls the operation of the type bar; Fig. .10 is a plan view of the synchronizing relay which is governed by the impulses coming over the hue; Fig. 11 is a perspective view of the line spacing mechanism; Fig. 12 is a sectional View of the constantly rotating drive shaft, and the device for reversing the carriage at the will of the operator; Fig. 13 is a sectional view along the dotted line 1313 of Fig. 12,1100king in the direction of the arrows, of the differential driving mechansm; Fig. 14 shows in diagrammatic form the va rious circuits and their electrical relations to the mechanical devices which are used to operate the typewriter; Fig. 15 is also a diagrammatic illustration of the transmitter used for controlling the impulses sent over the line; Fig. 16 is a diagrammatic view of the circuits concerned in operating the line spacing magnets and also showing the rela:

V the selector plungers; 7 is an enlarged perspective view of a.

rotating drive shaft is transmitted to the printing shaft and the type bar selector, and Fig. 18 is a section through the synchronizing relay. V

Referring now to the drawings in which the same parts are indicated by the same reference characters, and first to Figs. 1 to 5, a frame comprising upright members 1-1 as shown in Fig. 1, supports the (18,4 vices operating the typewriter mechanism and are secured to the frame 3 of the typewriter by means of. screws 2. Theframe 1 supports the paper carriage 4: which moves on ball bearings 5 as best shown in Figs. 2, 4 and 5, the usual roller, or platen 6 being supported by the carriage, @llhe paper sup.

ply roll 7 is mounted in standards 8 which are in turn supported by the paper carriage. The type bars 9 (see Fig. 5) are connected by means of bell cranks and levers to the long bars 10, as in ordinary typewriter practice, and as best shown in Fig. 5.

Type bar selector mechanism.

The construction and operation of the type bar selector mechanism will now be described with particular reference to Figs. 1, 5 and 6. A rotor or rotating member, which is here shown as a drum or cylinder 11, is mounted in standards 12. This cylinder carries a series of plungers 13 which are arranged along the cylinder in the form of a spiral, the plunger-s being simultaneou'sly rotated'by the cylinder about a common axis and independently movable trans versely thereof. I have here illustrated twenty-eight such plungers, though it will, of course, be understood that this number may be varied in accordance with the num ber of characters to be printed. The plungers pass transversely through the cylinder, perpendicularly to the axis, thereof, as best shown in Fig. 6, and one end of each plunger is enlarged as at 13, the enlarged end projecting from one side of the cylinder, while the opposite end projecting from the opposite side of the cylinder is contracted as at 13", the intermediate portion of the pin which is inclosed by the cylinder having a diameter intermediate between the diameter of the enlarged end and that of the contracted end. Each plunger is normally held in the position indicated in Fig. 6 by a coil spring 14 surrounding the plunger within the cylinder, one end of the spring being seated against the shoulder formed by the enlarged end 18, while the opposite end of the spring is seated against the wall of the cylinder surrounding the opening through which the contracted portion of the plunger passes. A stop 15 is secured on the contracted and threaded end 13 of the plunger, which stop normally engages the outer surface of the cylinderand thus limits the upward movement of the plunger as viewed in Fig. 6, under the influence of the spring 14. It will be understood, therefore, that the plungershave two movements, one a rotating movement due to the rotation of the cylinder, and the other a movement transversely of the cylinder caused by the depression of the enlarged end of the plunger.

Reference will now be made to Fig. 14 illustrating, in a general way, the means by which the selector cylinder and plungers are operated. A shown, the selector cylinder is driven by an electric motor through a shaft 62. Preferably said cylinder is un der constant stress tending to rotate it, and

insuch case the shaft 62 in the preferred arrangement Wlll be continuously rotated.

Thepower is transmitted from the motor through gearing and a secondary shaft 17 to a differential drive gear inclosed in a drum 18, the details of which differential gear will be more fully hereinafter disclosed. One side of the differential gear is connected through a friction coupling 19 to the selector cylinder 11. The said cylinder is geared. to the motor in such a way that, if allowed to run free, it would run at a higher speed than would the impulse measuring device at the receiving station which is operated by the transmitter, as will be more fully hereinafter explained.

Power is transmitted from the motor through the selector cylinder 11 and gear twenty-eight plungers each one of which is assigned either to the selection of a character or to some other operation. In the present arrangement, the shaft 21 is geared to the cylinder with a ratio of two to one, so that a single rotation of the cylinder causes two rotations of the star wheel shaft 21. Assuming that there are seven teeth on the star wheel, as shown, then each tooth of the star wheel will pass a given point twice during a single rotation of the cylinder, or fourteen teeth in all would pass the given point during such rotation and this number would correspond to twenty-eight single vibrations, or fourteen complete cycles of the forked piece 28, and this would be equivalent to a single vibration of the forked piece 23 in either direction for each one-twentyeighth part of a-revolution of the spiral cylinder or one vibration for each plunger of the cylinder. The teeth of the star wheel 22 are preferably cut at such an angle that when rotated in the direction of the arrow as indicated in Fig. 14, they act on the projections of the forked piece 23 and set it in vibration. Such vibration is due to the fact that as soon as one tooth has pushed the fork in one direction, another tooth impinges against the opposite side of the forked piece 23 which had been pulled toward the shaft 21, and thus pushes it away, and so long as the shaft 21 and the star wheel mounted thereon, are rotated, the forked piece vibrates.

The forked member 23 is also vibrated by the alternating electric current coming over the line wire Ql, and its mode of operation will now be described with particular reference to Fig. 10, which shows the relay which is operated by the alternating current and by reference to Fig. 14 which best shows the electric connections. The device wl .'ch is operated in response to the alternating current impulses, is here shown as a polarized relay comprising an upright shaft 25 which is mounted to oscillate in suitable bearings. Two armatures 26 and 27 are secured to the shaft 25, one above the other. Opposite these armatures and on either side thereof are "disposed pole pieces, the two pole pieces on one side of the armatures be ing indicated by the reference numeral 28, while those on the opposite side of the armatures are indicated by the reference numeral 29. The pole pieces 28 and 29 project laterally'from the electromagnets 30 and 31, respectively, the windings of which are connected in series and included in the line cricuit 24, the windings being so arranged versed by a current having the opposite polarity from that just assumed. A winding '25 as best shown in the diagram in Fig.

14:, surrounds the upright shaft 25 and is connected to a source of unidirectional current which produces fixed armatures 26 and 27.

Now, if an alternating current 1s sent over poles in the two 'the line 24, then the armatures 26 and 27 will bBxVlbl'EttQCl in synchronism with the alternating current impulses coming over the line. The pin cylinder is adjusted to rotate at a speed which mechanically vibrates the armatures 26 and 27 slightly faster than they are naturally vibrated by the cycles coming over the line, and with the parts so adjusted this excess speed is corrected, and the vibration of the armatures due to the mechanical movement of the pin'cylinder falls into synchronism with impulses coming over the line. In other words, if the selector cylinder is always rotated to vibrate the relay armature faster than the impulses coming over the line would vibrate the same, then the only work which the alternating current coming over the line is called upon to perform is to lay and thereby reduces theamount of line current required? tion, and then how the corresponding measurement is utilized and applied to the selection of the desired key.

Any well known device by which an alternating current of a desired frequency may be transmitted over the line may be used, and inasmuch as the transmitting mechanism constitutes no part of my present invention, I have shown for this purpose, in Fig. 15, a device of well known form. A suitable cylinder 32, which is provided with a number of pins spirally arranged and having the same number of pins as the selector cylinder, and here shown as twenty-eight in number, is provided. The cylinder 32 'is mounted on a shaft 32, which is rotated by any suitable means, but may be prevented from rotation by controlling levers 33, corresponding in number to the number of pins on the transmitting cylinder and of plungers on theselector cylinder, but only one of which is here shown. The shaft 32 is operated by a pulley 34, which may be connected to any suitable source of power, a friction clutch 35 being interposed between the driving pulley and the pin cylinder shaft, so that the driving pulley may, at times, rotate without rotating the pin cylinder. tater 36 is shown connected by gearing of proper ratio to the pin cylinder 32. With a four part commutator and with twentyeight pins on the pin cylinder, this ratio is seven to one. Three brushes bear against opposite sections of the commutator 36 and are connected to any suitable direct current generator 38*. Brushes 39 also bear on opposite sections, which, as the commutator is rotated, come into contact with alternate sections, whereas brushes 37 are always in contact with the same sections. As the commutator rotate, therefore, the direct current coming from generator is changed to an alternating current, which passes over the line 24.

The number of impulses, therefore, sent over the line during a given time corresponds to the number of pins of the transmitting cylinder which. pass a given point during that time, and this number in turn depends upon the amount of rotation of the cylinder. Thenumber of impulses. will, therefore, correspond to the interval between any two selected pins. If, for example, the cylinder is allowed to make a complete revolution, then twenty-eight impulses will. besentvover the line, and a cor.

A four-part commuresponding fractional number will be sent corresponding to a partial rotation of the cylinder.

If the pin cylinder is brought to rest, and with it the commutator, it will be apparent that a direct current will pass over the line having a polarity corresponding to the po larity of the last alternating impulse that sent, and this direct current characteristic is made use of to effect the printing of the character, after it has been sel cted, in. a manner that will be more fully hereinafter described. The armature of the polarized relay shown in Figs. 10 and l t, vibrates in exact synchronism with the alternating current impulses coming over the line, and as soon as these impulses are discontinued and instead adirect current passes over the line, the vibrating armature will remain at rest on the side of the polarized relay determined by the direction of current of the last impulse thatcame over the line. lVhen the vi brating armature comes-to rest, it also brings to rest the selecting spiral 11 shown in Fig. ll, since the star wheel 22 is held by either of the projections of the forked piece 23, which is rigidly attached to the armature shaft 25. It is to be observed that every impulse or half wave coming over the line acts as corrector or governor to control the speed of the rotating spiral selector 11.

Of the twenty-eight pins on the spiral selector of the receiver, twenty-four are used for selecting the characters, and of the other four, two are used. for shifting the type from one set of characters to another. The characters which are most frequently used are located where they will come into use in the normal position of the receiving instrument, and the punctuation marks and figures and some of the characters, which are frequently used, are located in the shitzed position. When a character in the shifted position is required, it is obtained by first depressing the shift key which shifts the type bar and looks it, then pressing the key of the character required, and after it is printed if there are no further characters desired in the shifted position, the shift release key is depressed which unlocks and returns the characters to normal position.

'f the remaining two keys, one is used to operate the mechanism which spaces between words and the other to operate the mechanism for repeating the line space. The carriage reverse key is operated at the end of or at any part of a line, and permits a continuous alternating current to go to the line under such conditions that the carriage is restored to its normal position and all receiving machines are brought to a unison or a zero point with the result that at least once in every line any of the receiving instruments that are out of synchronism will all be brought back into synchronism at the assess? ent case three complete revolutions of the pin cylinder are required to bring about this result.

Printing mechanism.

Having now described the method by which any desired plunger of the rotating cylinder at the receiving station is selected, I will now describe the manner in which this plunger is operated and how its operation effects the printing of the desired character on paper.

deferring now more particularly to Figs. 1, 5 and ll, 3l is a slotted bar arranged for vertical movement above the pin selector cylinder, such movement being at rightangles to the axis of the cylinder. This bar is guided in its movement by slotted guide members engaging the ends of the bar 34. These guides also retain the bar 3a in a fixed position longitudinally with respect to the plungers of the cylinder 11. The lower edge of the bar 3 is provided with a series of slots 36, as best shown in Fig. 1, each slot being located above one of the plungers of the selector cylinder. These slots are provided for the purpose of permitting the contracted ends of the plungers to pass the.

bar 3%: freely. It is to be noted that for each enlarged end of a plunger which pro-- jects from a given side of the cylinder, there will also be a contracted end of another plunger on the same side of the cylinder and in line with the first plunger. These slots are made narrow enough to engage the large ends of the pins but of sui'licient width to permit the contracted ends of the pins to pass. The bar 34; is located above the axis of the selector cylinder, and as this cylinder is rotated the enlarged ends of the plungers are successively brought beneath the bar. When the proper plunger has been selected and brought .to rest beneath the bar, if the bar is then caused to move downwardly, it will strike against the enlarged end of the plunger and force it downwardly, whereas the small end of the plunger which happens to be in line with the selected plunger, will not b moved by the bar since the contracted end will enter one of the slots 36. There is a force constantly applied to the shaft 38 disposed above the bar 84 which tends to rotate the shaft and to effect the movement of the bar 34l,but the rotation of the shaft 38 is normally prevented by an escapement which will presently be described. An arm 37 is secured to the, shaft 38, .as best shown in Fig. 9. This arm has secured to one side thereof a stop 39 which engages other stops or pallets secured to the face of the arm 40 which is pivoted at 41 and which is actuted by means of a lever 42 provided with a slot en- I gaging a pin 43 which is adjustably mounted high impedance, it does not respond to the alternating current. The armature 46 is normally held away from the pole of the magnet 45 by means of a spring 47 which is connected to an arm 48 adjustably secured to the shaft 44. The movement of the armature 46 in response to the energization of the magnet 45 will bring the vibrating arm 40 against a stop 49as will readilybe apparent from an inspection of, Fig. 9, while the spring 47 tends to bring the arm 40 into engagement with the shaft 38. After the selector cylinder has come to rest with the desired plunger under the bar 34, then the direct current of either polaritywhich comes over the line when the commutator at the transmitting station stops rotating, will-energize the magnet 45 and through the described escapement mechanism permit the shaft 38 to rotate. The shaft 38 receives its power through a friction clutch 50 which is connected to one side. of the differential driving mechanism contained within the drum 18. Fixed to the shaft 38 are two eccentrics 51, the straps 52 surrounding whichare connected by suitable brackets 54 to the bar 34. When the shaft 38 is rotated, therefore, the eccentrics force the bar 34 downwardly, and any selected plunger 13 which may happen to be under the bar 34 is given a downward movement against the action of the spring 14, and the continued rotation of the shaft 38.will return the bar 34 to its upper position and permit the spring 14 to return the plunger, which it surrounds, to its normal position.

. The downward movement of the plunger brings about the operation of the corresponding type bar 9 in a manner which will now be described. Resting on each of the type bar levers 10, as best shown in Figs. 1, 5 and 8, are auxiliary or hammer levers 55. These levers are provided with adjustable means, which are here shown as consisting of an eccentric collar 56 permanently fastened to the end of the lever by means of a screw 57. 7 (See Fig. 8.) The object of I these eccentric collars is to secure a, suitable adjustment for the proper throw of the type bar levers and also to take up any wear position by cross bars or pins 61 as best the spiral selector.

which may occur. The levers 55 are pivoted in a slotted bar 58 on a common bar or shaft 59 which is embedded within a slot 60 within the bar 58, the bar 59 being secured in shown in Fig. 9. Each lever 55 has a suitable guide slot to prevent lost motion at the end of the lever and is so mounted that the end of the eccentric collar 56 normally rests on the top of the type bar lever 10.

There is an auxiliarylever 55 corresponding to each type bar, and the number of such levers is the same as the number of pins on Each plunger of the spiral during the rotation of the spiral selector, passes directly over one of the auxiliary levers 55 and when the spiral selector is brought to rest, one of the plungers will be directly above one of the auxiliary levers so that when the shaft 38 is rotated, as previously described, and the slotted bar 34 forced downwardly, the selected plunger will be forced downwardly and the small end of the plunger engaging the auxiliary lever 55 will force the latter downwardly and it, in its turn, will actuate the type bar lever 10 and force the type bar 9 against the platen 6 and thereby bring about the printing of a character.

Letter spacing mechanism.

The letter spacing is. accomplished by mechanism which is purely a part of the typewriter, and constitutes no partof my present invention, except, in so far as the same relates to the means for putting the typewriter mechanism into operation. A space is produced between successive printed letters by any well-known means such as are used in standard typewriter practice. Whenever any one of the auxiliary type bar levers 55 is depressed, and the lever 10 operated, controlling mechanism which engages a rack 1 on'the paper carriage is released, and the carriage, which is under the tension of a spring and, therefore, under constant stress, moves forward a step and produces a space for another letter. In accordance with my invention, however, means are provided for automatically supplying power to restore the carriage to its normal position, and thus wind up a spring and store suflicient energy for spacing the full width of the carriage, the means by which this is accomplished being under the control of a key on the key board. This mechanism will be more fully described under the Carriage reverse mechanism.

The letter spacing is, however, the opposite from the method usually practised in the ordinarytype-wheel page printers. In this latter class of machines, the type-wheel is usually moved against the force of a retracting device, and at the end of a line the type-wheel is released and the retracting 13 0 shaft 62 will also rotate the gear one revolution for a single rotation of the shaft, and the sleeve which is not held from rotating will then run at twice the speed previously assumed. The-action of the differential is as follows: Thedifferential drum 7.7 is turned by the driving shaft in the direction of the arrow. Normally, both the fly-wheel and the clutch member are free to move when rotated, in the same direction, since the two differential gears 78 and 79 are moved by the diflerential gear 80, and they all rotate as a unit about the axis of the drive shaft 62 in thedirection indicated by the arrow when no restraining force is applied to either end of the differential, and both the fiy-wheel andthe clutch member 73 will eventually rotate at the same rate of speed.

Assuming now that the clutch member 7 8 is held stationary with the drive shaft rotating in the same manner as before, the action of the moving elements will be as follows: The driving bevel gear 80 and the differential drum 77 towhich it is attached, are rotated in the same direction as the drive shaft. Since the gear 78 is held sta tionary, the gear 79. obviously will rotate at twice the speed previously assumed, and at twice the speed of the rotating drum 77.

It is, therefore, seen that any difference in rotation of the fly-wheel and the clutch member 73 is compensated for by the rotation of the differential gear 80 revolving bodily around the drive shaft. Any rotation of the differential gear 80, means that it rolls on one of the other gears 7 8 or 79, and this rolling motion on one of the gears is transmitted to the other as an additional turning and driving effect. Any'retarded motion, however, of the clutch member 73 which may occur, for instance, when it comes into engagement with the clutch member 68 and, therefore, meets the resistance offered by the spring of the reversing carriage, results in an acceler ated rotation of the fly-wheel. It is during this interval, or during the time that the flywheel is tending to increase its speed, that suflicientforce is applied to the carriage to cause a reversal of the same against the action of the spring, and by a suitable adjustment and weight of the fly-wheel with reference to the carriage and the parts associated therewith, thecarriage may be completely restored, while the fly-wheel is increasing in speed arid finally'the fly-wheel will be rotating at substantially twice the speed that it rotated before the clutch memhers wereengaged, and the speed of the clutch member 7 3 will be correspondingly retarded atthe end of the carriage" reverse. This results in the carriage being reversed by the inertia dueto the increase inspeed of the'flv-wheel, and the carriage 'will' be brought against a fixed stop without undue shock, and at the same time the carriage is' positively reversed in a simple manner. It will also be apparent that the reversal is ac-. complished without the use of a friction clutch or other slipping device, and avoids all the uncertain and changeable adjustments which are ordinarily required by such a device.

Y Line spacing mechanism.

In accordance with my invention, power means are provided for operating the line spacing mechanism automatically at the end of each line, or whenever the carriage is re versed, the power means being constantly ready to actuate the line spacing mechanism, and additional means are provided for repeating the line spacing or feeding the paper as many spaces as desired, all of which are controlled by a key at the transmitting station. The line spacing mechanism is operated byan electric magnet which is pref erably energized by current taken from the same source of electric energy as that which supplies current to the electric motor and controllable by a key at the transmitter. The line spacing mechanism will best be understood by reference to Fig. 1, 4, 5, 7 and 11. Magnets 87 are supported by means of a bracket 88 which is fastened to the frame 3 of the typewriter. Pivoted to a bracket 89 which is fastened to the typewriter is an armature 90 which is operated by the electro magnet 87. This armature is mounted on a support 94 which moves about a pivot Suitable nuts 97 engage the threaded por- 7 tion of the post, in order to provide for the adjustment of the spring 95. One end of the spring bears upon the extension 98 of the armature support 94, its function'being to keep the armature 90 away from the poles of the magnet 87 Attached to the paper carriage is a contactbar 99, as shown in Figs. 1, 4, 11 and 16, which moves with the carriage. This contact bar is provided with a wedgeshaped piece or shoe 100 which is insulated from the bar 99, as indicated in Fig. 16. The contact bar or shoe 99 is adapted to engage suitable spring contacts 101 which are in series with the electromagnet 87 and connected to the source of current which operates the motor 16. The arm 92 is provided with an extension 102 which is bent back and parallel to the arm 92. The end of this bent portion is preferably provided with an inclined edge, as shown at 103. Mounted on the'shaft 104 of the platen 6, so as to turn ltd;

freely about it, is an arm 105. Pivoted to the end of this arm is a pawl 106 which engages a ratchet-wheel 101' ed on the shaft 10 1, so that any turning movement of the ratchet-wheel is communicated to the shaft 10-1- and to the paper platen 6 which is mounted thereon, The pawl 106 is held in engagement with the teeth of the ratchet wheel 10;- by means of a spring 108, one end of which is secured to the arm 105, as shown. The coil spring 109 loosely surrounds the shaft 10%, one end thereof being secured to the frame of the carriage, the other end being connected to the arm 105 in such a way as to return the latter to its normal position 7 against a suitable stop. The end of the arm 105 has an extension 110 with a groove on its lower side which engages the bent arm102.

lh hen the carriage has been fed to the.

lelit, as viewed. in 1, and is returned by means of the reversing mechanism after printing a line or part of a line, the contact shoe 100 engages the two spring contaets 101 and thereby closes the circuit through the magnets 87, which are there upon energized and attract the armature 90. The movement of the armature 90 toward the magnet rotates the shaft 91 and produces an upward movement of the arm 92, as viewed in Fig". 11, the bent end 109, 01" which engages the grooved end 110 01' the arm supporting the pawl 100. llhis results in a movement of the pawl 1015 which turns the paper roll the proper amount for spaeing'. As the carriage is moved to the left agaln, the contact shoe 100 1s disengaged tl t t 101 "l T b l 11cm 10 con-ace ,tielcey [reading no circuit and deenergizing the magnet 82 The adjustment is such, however, that such disengagement and deenergization does not occur until alter the first letter space oil the following line has been made.

Additional lino spaces may be made by simply depressing a key in a manner which will now be described and which will best be understood by TGLFGITGHCO to Fig. 7. Contacts 111 are suitably insulated from each other, and adjustably mounted. by-means of a clamp 112 to a post 113, the latter being fastened to the frame 3 of the typewriter. The contacts 111 which extend downwardly are normally engaged by a bridging contact member 11 1. This member is secured. to one of the levers 10 of the typewriter, which lever, however, has no type Jar connected to the same. This lever is operated in the same manner as the other levers, by means of one ot the auxiliary hannners which is depressed by one oil the selector pins. When the lever 10 is moved downwardly, it breaks the electric circuit which is under normal conditions closed by the contact member 11%: (Figs. 7 and. 16). The contacts 111 also are learner in series with the magnets 87 and with the contacts 101 which are closed by the return movement of the ear .iage.

Assuming now that the carriage has been reversee and moved to the ext'eme right,

as viewed in Fig. 1, against its limit stop,

inc the key controlling the selector pin lin contact member 11-1 not connected to the escapemen inechani which controls the carriage, and permits the carriage to move when any 01 the other characters are selected and printed. lts only trinction is to open and close the magnet 87 when it is desired to repeat line spaces. 7

The method by which the paper is fed to the platen 6 from a ccntimlous roll, will. best be uru'lerstood by reference t igs. 1, 1 and 5. The pa er roll 7 is mounted on a spindle 115 and secured thereon by means ol two'pin shaft clamps 116. The paper is fed dowinvardly between the proper rolls 117 and the printing platen l3, and is retained therrmn by the small guide rollers 11!). The paper then passes upwardly and 1S continuor, red as the platen roller 6 is rotated wh; iever the magnets 87 are energized and eeenergized. Flanges 119 assist in p ng the paper on and 0a the platen 6.

It is to be observed that the energy necessary for feeding the paper for line spacing is supplied from a source independent from the line current. While I have here illustra ted electromagnets for operating the line spacing;- meclnmism, I do not desire to be limited to the same, as it will be obvious to those skilled in the art that the same result could be produced by other devices.

Unison and carriage reverse control mechamsm.

of the dish. Ashoulder or lug- 121 projects from the periphery of the disk. A lever 123 which is pivoted at 12-1 and carries an extension 125 above the pivot, as viewed in h1g1 2, cooperates with the disk 120. The

arm 123 is provided with extensions 123 within which the arm 125 is secured on a pivot, so that the upper arm moves with the arm 123 about the pivot 12%, and has an independent movement toward and away from the disk 120, and at right angles to the plane of the first movement referred to. The upper end of the arm 125 is provided with a roller 127. (See Fig. 1). The arm 125 is provided with a stop 128 which projects within the path of movement of the lug 121, and is also provided with apin 129 which engages the spiral groove in the face of the disk 120.

N ow when the spiral selector 11 is rotated the pin 129 which engages the spiral groove in the disk 120 will be moved to the right, as viewed in Fig. 2, and with it the arm 125, and'such movement will continue until the lug 1 1 on the disk engages the stop 128 of the lever 125. When such engagement takes place, the spiral selector stops rotating, and, at each of the receivers, the spiral selectors vill all have been brought to the same relative positions. During this movement of the arm 125, the lower end of the lever 123 is moved to the left. The lower end of the lever 123 is enlarged and is provided with an opening through which a rod or bar 130 passes, as best shown in Fig. 2. This rod extends through a guide 131 and is connected by a pivot 132 to the lower end of a forked lever 133 which is pivoted at 1341. The upper forked end of this lever is provided with two pins 135, extending into and engaging a groove formed on the periphery of the clutch n ember 73. When the lever 125 is moved to the right, as viewed in Eig. 2, by the rotation of the threaded disk 120, it also moves the clutch member 78 into engagement with the complementary clutch member 68, and eventually brings the projection or lug 121 of the disk into engagement with stop 128.

Since all of the characters are selected during one rotation of the spiral selector 11, the lever 125 does not move far enough to bring about the operation above referred to, while the characters of a given line are being printed.

Mounted on the printing shaft 38 is a cam face disk 136. The roller 127 which is mounted on the upper end of the lever 125 rests against the plane face of this disk, and in such position permits the pin 129 to engage the threads of the disk 120. lVhen the printing shaft 38 is rotated, however, to print a character, the cam face 137 on the disk 136, strikes the roller 127 and forces the pin 129 out of engagement with the threaded disk 120, and a spring 138, one end of which is secured to the arm 123 and the other end of which is attached to the stationary part of the mechanism, returns the arm 125 to its original position.

In order to bring about the operation of the clutch for the purpose of reversing the carriage and bringing the threaded disk 120 to a unison stop, the spiral selector 11 is allowed to rotate more than a single revolution, and in the embodiment of my invention here shown, is permitted to complete three revolutions, though it will, of course, be understood that any other number of revolutions would answer the purpose.

The unison stop 121 is so adjusted that when held by the stop 128 on the lever 125, the blank or word spacing plunger 13 is beneath the printing bar 3 1.

A spring 139, as best shown in Fig. 2, is provided for the clutch member 68 and which exerts a slight pressure against the same. This spring surrounds the shaft 62 and is held in position between the disk 68 and a collar with a shoulder fixed to the shaft. This spring is provided for the purpose of producing a slight rotating motion in the cord drum, which takes up the slack of thecord and keeps it at a uniform tension, thus preventing it from becoming displaced from the pulleys, while the carriage is being spaced for printing characters.

Power transmission for type-bar selector and printing.

rotate in the hub portions of the flanges 145 and 146, which inclose the end of the drum 18. I

A shaft 147 passes through the center or the sleeves, keeping them in alinement and acting as an axis, about which the drum 18 rotates.

Mounted on the end of each sleeve which projects through the hub of the flanges 145 and 1 16 are gears 1&8 and 1 19, which engage other gears connected by friction clutches so as to transmit power to the spiral selector 11 and to the shaft 38.

The function of this differential mechanism in principle similar to that explained in Fig. 12. The use of this device has a'decided advantage as a means for tranmitting the power necessary to operate the printing shaft and the spiral selector cylinder. It can be seen that power must be supplied in such a way that when either or both of these shafts are held by their escapeinents, means must be provided for disconnecting the power, or interrupting it, while so held. If such were not the case, then directly either of these shafts were stopped by the escapement the motor Would exert its full power, with the result of breaking of parts and uncertain operation.

By the use of this differential gear, a practical uniform transmission of power may be maintained because the friction clutch may be so adjusted that any irregularity due to improper lubrication of the clutch surfaces is at once compensated for by the differential gear.

As an illustration to more clearly bring out this point, one of the gears attached to either of the revolvingsleeves could directly drive a gear permanently fixed to either of the shafts 38 or 11, provided one of them was actuated through a friction clutch. In other words, if the gear driving the spiral selector cylinder was fixed fast thereon, and the shaft 38 was driven through a friction clutch 50, if this friction clutch was adjusted so that suilicient power was transmitted to rotate shaft 38, then this same driving torque would drive spiral selector 11 while slipping at clutch 50.

Suppose, now, that shaft 38 is held fixed by its escapement, then, if 11 were allowed to rotate, the power transmitted to it would be that due to the frictional contact of the cluch 50.

If 11 were held. by is escapement and 3S permitted to rotate, practically the same driving force for shaft 38 would be obtainedfrom the differential.

If both shafts were held, then the slip would take place at the friction clutch 50, assuming that the gear on the selector cylinder 11 is fixed, and the drum 18 rolls about its axis under this condition and gear M3 makes a double turning effort, compensating for the end which is held stationary.

It, therefore, may be seen that a flexible power may be transmitted to two shafts constantly with but a single slipping clutch, and to that extent it is possible to provide a practical permanent adjustment to the friction clutch on account of the compensation which takes place.

In the claims, the designation of type bars as the things to be operated is in tended to include not only type bars, but equivalent devices, examples of which equivalent devices herein shown and de scribed are the shift. the shift release, the mechanism for spacing between words and the line space.

lVhat I claim and desire to secure by Let ter Patent of the United States is:

1. In a printing telegraph receiver, the combination of a plurality of type bars, type bar selecting and operating mechanism consisting of a rotor carrying a group of spirally arranged plungers adapted to be rotated about the axis of the rotor and movable transversely thereto, a paper carriage carrying a printing platen and paper, and a line spacing mechanism, independent mechanism operatively connecting all of said devices with a common power for actuating said devices.

2. In a printing telegraph receiver, the combination of a plurality of type and operating bars, a line circuit for transmitting electric impulses, a group of selective plungers having rotary and transverse motion, means directly responsive to said line m1- pulses for selectively positioning said plua gers, means for actuating the plungers, means co-acting with the plungers for actuating the type and operating bars, a shaft under constant stress tending to rotate said plungers, a platen and paper-carriage-moving mechanism under constant stress tending to move the platen and the carriage for ward, an escapement controlling the papercarriage mechanism, a line spacing mechanism with means constantly ready to actuate the same, and a device for controlling said line spacing mechanism.

3. In a printing telegraph receiver, the combination of a plurality of type and operating bars, a line circuit for transmitting electric impulses, a group of selective plungers having rotary and transverse motion, means directly responsive to said line impulses for selectively positioning said plungers, means for actuating the plungers, means for controlling the operation of the actuating means, means co-acting with the plungers for actuating the tyne and operating bars, a shaft under constant stress tending to rotate said plungers, a platen and papercarriage-moving mechanism under constant stress tending to move the platen and the carriage forward, an escapement controlling the paper-carriage mechanism, a line spacing mechanism with means constantly ready to actuate the same. and a (le vice for controlling said line spacing mechanism.

4. In a printing telegrz ph receiver. the combination of line-spacing mechanism with energy constantly ready to actuate the same, a rotor, a transversely movable group of type-bar selective plun ers carried by said rotor. means for actuating the same, coop crating means for actuating the line-spacing mechanism controlled by the rotation of the rotor carrying the selective plungers, and a. printing shaft independent of said rotor for actuating said plungers.

In a printing telegraph receiver, the combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and. independently movable across. said axis, line spacing mechanism with independent power means constantly ready to actuate the same, a paper carrier, a constantly rotatingdrive shaft, and a controlling means for the line spacing mechanism for continuously repeating line spaces.

6. In, a printing telegraph receiver, the combination of a plurality of type and oper ating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, and electrically operated means responsive to the return movement of the paper carriage for actuating said line spacing mechanism.

7 In a printing telegraph receiver, the combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable across said axis for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, and electrically operated means controlled by the op eration of one of said plungers for actuating the line spacing mechanism.

8. In a printing telegraph receiver, the combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, and means under the joint control of the return movement of the paper carriage and of a predetermined operating bar for actuating the line spacing mechanism.

9. In a printing telegraph receiver, the

combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, and electrically operated means under the joint control of the return movement of the paper carriage and of a predetermined operating bar for actuating said line spacing mechanism.

10. In a printing telegraph receiver, the combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, and an elertro-responsive device controlled by the movement of the paper carriage and by the movement of a predetermined operating bar for actuatingsaid mechanism.

11. In a printing telegraph receiver, the

combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operatin the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, an eleciil'O-lGSpOllSlVQ device included in-a circuit for actuating said line spacing mechanism, and two sets of contacts included in said circuit, one set being controlled by the return movement of the paper carriage and the other controlled by a predetermined operating bar.

12. In a printing telegraph receiver, the combination of a plurality of type and operating bars, a group of selective plungers adapted to be rotated simultaneously about a common axis and independently movable transversely thereof for operating the type bars, a paper carriage, a constantly rotating drive shaft, line spacing mechanism, an electroresponsive device included in a circuit for actuating said line spacing mechanism, normally open cont-acts closed by the return movement of the paper carriage included in said circuit, and normally closed contacts which are opened by a predetermined operating bar, also included in said circuit.

13. In a printing telegraph receiver, the combination of a rotatable member, a group of spirally arranged plungers mounted on said member, and independently movable transversely of the axis thereof, means for selectively engaging and depressing one end of said plungers, and typewriter mechanism controlled by the other end of said plungers when depressed.

14. In a printing telegraph receiver, the combination of a rotatable member, a group of spirally arranged plungers mounted on said member, and independently movable transversely of the axis thereof, means for selectively engaging and depressing one end of said plungers, said means being inoperative with respect to the other end of said plungers when they are in line with said means.

15. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars comprising a member provided with a group of plungers rotatable about and extending across a common axis and movable transversely of said axis.

16. In a printing telegraph receiver, the combination of a plurality of .type bars, and means for operating mid type bars comprising a group of plungers rotatable about and extending across a common axis and independently movable transversely of said axis.

17. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars compriso r o a) a group oi ilungers simultaneously rotat blc about and extending across a common axis and independently movable transversely of said axis, 7

18. In a printing telegraph receiver, the combination of a plurality of type bars, and means lor operating said type bars comprising a group of spirally arranged plungers simultaneously rotatable about a common axis and independently movable transversely of the axis.

19. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars comprising a rotatable member provided with a group oi spirally arranged plungers independently movable transversely of the axis of said member.

20. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars comprising a cylinder rotatable about its axis and provided with a group of spirally arranged plungers movable transversely of the axis of said member.

21. In a printing telegraph receiver, the combination of a plurality of type bars, a group of plungers rotatable about and extending across a common axis and independently mo able transversely of said axis, means for selectively moving said plungers transversely of the axis, and means responsive to the transverse movement of said plungers for operating the type bars.

22. In a printing telegraph receiver, the combination or a plurality oi. type bars, a group of plunger-s rotatable about and extending across a common axis and independently movable transversely of the axis, a member movable toward and away from said axis for selectively moving said plungers transversely of the axis, and means responsive to the movement oi said plungers for operating the type bars.

23. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars com-- prising a rotatable member provided with a group of plungers independently movable transversely of the axis of said member, the ends of said plungers normally projecting beyond said member.

2 1-. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said type bars comprising a rotatable cylinder, a group of spirally arranged plungers mounted on said cylinder and independrpitly movable transversely of the axis thereof, the ends o'l. said plungers projecting beyond the sin-taco the cylinder.

25. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating'said bars comprising a group of spirally arranged plungers roneat-n57 tatable about a common axis and independ ently movable transversely of said axis, one end of each plun er being larger than the other, means selectively engaging the larger ends of the plungcrs for operating the same, said means being arranged to permit the passage of the smaller ends of said plungers.

26. In a printing telegraph receiver, the combination of a plurality of type bars, and means for operating said bars comprising a group of spirally arra ged plungers rotatable about a common axis and independently movable transversely of said axis, one end of each plunger being larger than the other end, and means for selectively moving said plunger-s transversely ct said axis comprising a bar movable toward and away from said axis and provided with a plu rality oi? slots registering with said plungers and of sullicient width to permit the smaller ends of the pins to pass therethrough.

27. In a printing telegraph receiver, the combination ol a plurality of type bars, and means for operating said bars comprising a group on? spirally arranged plungers simul* taneously rotatable about a common axis and independently movable transversely of said axis, means for selectively operating said'plungers transversely of the axis comprising a reciprocatory bar for engaging said plungers, and means responsive to the movement of said plungers for operating said type bars.

28. In a printing telegraph receiver, the combination oi? a typewriter having a plurality of operating bars, means for operating said bars comprising a rotatable member provided with a group of plungers rotatable with said member and movable across the axis thereof, and means responsive to the movement of a predetermined plunger for operating the shift bar of the typewriter.

29. In a printing telegraph receiver, the combination oil a typewriter having a plurality of operating bars, means for operating said bars comprisin a rotatable member provided with a. group of plungers rotatable with said member and movable across the axis thereof, and means responsive to the movement of a predetermined plunger for operating the release bar of the typewriter.

30. In a printing telegraph receiver, the combination of a typewriter comprising a plurality o l type bars, and means comprising a group of plungers rotatable about and extending across a common axis and independently movable transversely thereof for operating said type bars.

31. In a printing telegraph receiver, the combination of a typewriter comprising a plurality of type bars, and means comprising a rotatable cylinder provided with a plurality of plungers mounted thereon and 

